////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2008 Michiel Helvensteijn                                    //
//                                                                            //
// This file is part of the Mist compiler.                                    //
//                                                                            //
// The Mist compiler is free software: you can redistribute it and/or modif   //
// it under the terms of the GNU General Public License as published by       //
// the Free Software Foundation, either version 3 of the License, or          //
// (at your option) any later version.                                        //
//                                                                            //
// The Mist compiler is distributed in the hope that it will be useful,       //
// but WITHOUT ANY WARRANTY; without even the implied warranty of             //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              //
// GNU General Public License for more details.                               //
//                                                                            //
// You should have received a copy of the GNU General Public License          //
// along with the Mist compiler.  If not, see <http://www.gnu.org/licenses/>. //
////////////////////////////////////////////////////////////////////////////////

#ifndef OUTPUTPRODUCER_HPP
#define OUTPUTPRODUCER_HPP

/******************************************************************************
 * Includes                                                                   *
 ******************************************************************************/

#include <string>
using std::string;

#include <ostream>
using std::ostream;

/******************************************************************************
 * OutputProducer class                                                       *
 ******************************************************************************/

template <class T>
class OutputProducer {
	public:
		
		virtual ~OutputProducer() {}
		
		virtual operator string() const =0;
		
		virtual ostream& send_to_stream(ostream& out) const =0;
};

template <class T>
ostream& operator<<(ostream& out, const OutputProducer<T>& wrapper);

/******************************************************************************
 * Function implementations                                                   *
 ******************************************************************************/

template <class T>
ostream& operator<<(ostream& out, const OutputProducer<T>& wrapper) {
	wrapper.send_to_stream(out);
	return out;
}

#endif // OUTPUTPRODUCER_HPP
